CA2100455C - Filter insert for containers - Google Patents
Filter insert for containers Download PDFInfo
- Publication number
- CA2100455C CA2100455C CA002100455A CA2100455A CA2100455C CA 2100455 C CA2100455 C CA 2100455C CA 002100455 A CA002100455 A CA 002100455A CA 2100455 A CA2100455 A CA 2100455A CA 2100455 C CA2100455 C CA 2100455C
- Authority
- CA
- Canada
- Prior art keywords
- filter insert
- plunger
- filter
- liquid
- container
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000007788 liquid Substances 0.000 claims abstract description 33
- 239000000463 material Substances 0.000 claims abstract description 7
- 238000001914 filtration Methods 0.000 claims description 4
- 241001122767 Theaceae Species 0.000 abstract description 11
- 229920003023 plastic Polymers 0.000 abstract description 3
- 239000004033 plastic Substances 0.000 abstract description 3
- 238000001802 infusion Methods 0.000 description 17
- 238000000926 separation method Methods 0.000 description 10
- 238000000605 extraction Methods 0.000 description 6
- 238000003825 pressing Methods 0.000 description 6
- 239000000706 filtrate Substances 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920000136 polysorbate Polymers 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000896693 Disa Species 0.000 description 1
- 229920003266 Leaf® Polymers 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J31/00—Apparatus for making beverages
- A47J31/18—Apparatus in which ground coffee or tea-leaves are immersed in the hot liquid in the beverage container
- A47J31/20—Apparatus in which ground coffee or tea-leaves are immersed in the hot liquid in the beverage container having immersible, e.g. rotatable, filters
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47G—HOUSEHOLD OR TABLE EQUIPMENT
- A47G19/00—Table service
- A47G19/12—Vessels or pots for table use
- A47G19/16—Tea infusers, e.g. infusing bags, egg-shaped infuses
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Apparatus For Making Beverages (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Food-Manufacturing Devices (AREA)
- Centrifugal Separators (AREA)
- Packages (AREA)
- Apparatus Associated With Microorganisms And Enzymes (AREA)
Abstract
A filter insert (1) for containers, in particular tea pots, where a certain dwelling time should be secured for the filter pulp in a liquid withheld in the container, the insert consisting of a preferably circular cylindrical filter unit (1), extending downwards from the top of the container at least reach down below the surface of the liquid in the container when being filled, and where at least one plunger shaft (4) with a plunger (5) sliding in a plunger guide (7) is extending axially through the upper part (3), where the plunger (5) is provided with a rim flange (5a) and can be moved to the bottom of the filter insert (1), is improved by having the filter insert (1) divided in at least two sections, a bottom part (2) and a top part (3), where the bottom part (2) consists of a material, for instance plastics, which is impermeable to the liquid, and the top part (3) mainly consists of a material permeable to the liquid, for instance a wire screen (3a), which can keep the filter pulp, and where the plunger (5) also-is impermeable and vaulted upwards, so that the central area is higher than the circumference area, which is made with an upright rim flange (5a).
Description
WO 92/13475 PCI'/DK92/00033 ~lUU~~7 Filter Insert for Containers The present invention relates to a filter insert for containers, in particular tea pots, where a certain dwelling time should be secured for the filter pulp in a liquid withheld in the container, the insert con-sisting of a preferably circular cylindrical filter unit, extending down-s wards from the top of the container at least reach down below the surface of the liquid in the container when being filled,- and where at least one plunger shaft with a plunger sliding in a plunger guide is ex-tending axially through the upper part, where the plunger is provided with a rim flange and can be moved to the bottom of the filter insert.
t o Such filter inserts are already known, for instance from FR-Pa-tent no.1.196.574, where both plunger and the bottom of the filter in-sert are perforated with a view to the free passage of the liquid, while tea leafs -are -kept inside between the plunger and the bottom of the filter inset. The plunger is provided with a reinforcing rim rib, ex-t s tending towards the bottom of the filter insert. The volume, in which the infusion takes place, is in this filter insert limited to between the lower third and half of the filter insert volume, which is insufficient for a complete infusion. Further, the infusion can not be stopped after pressing down the plunger, as an infusion still takes place through the 2o perforations in the bottom of the filter insert and in the plunger.
Furthermore, the plunger during the infusion shall be kept in its top position, e:g. through friction, failing which it will sink and -limit the infusion volume further.
Also, it is known to use filter inserts, for instance in the form of 25 a paper filter, which, fastened in a fixture, hangs down from the top of the container. This filter insert works satisfactory, but encumbered with those inconveniences, that the volume of infusion is relatively small, and that the filter insert after expiration of the extraction time must be taken up from the liquid so as to prevent further infusion 3 0 : between the liquid and the filter pulp, after which the larger part of the liquid contained in the filter pulp normally should be squeezed out from the filter pulp and deposited after that. This can not always take place, as both the pressing and the deposit possibillities can be limited in time and locality, and besides, the mechanical strength of 3 5 the paper material is limited. The need for pressing the filter pulp has arizen from, partly, the desire to reduce waste or, partly, to prevent dripping of liquid on the way between the container and the place of deposit.
t o Such filter inserts are already known, for instance from FR-Pa-tent no.1.196.574, where both plunger and the bottom of the filter in-sert are perforated with a view to the free passage of the liquid, while tea leafs -are -kept inside between the plunger and the bottom of the filter inset. The plunger is provided with a reinforcing rim rib, ex-t s tending towards the bottom of the filter insert. The volume, in which the infusion takes place, is in this filter insert limited to between the lower third and half of the filter insert volume, which is insufficient for a complete infusion. Further, the infusion can not be stopped after pressing down the plunger, as an infusion still takes place through the 2o perforations in the bottom of the filter insert and in the plunger.
Furthermore, the plunger during the infusion shall be kept in its top position, e:g. through friction, failing which it will sink and -limit the infusion volume further.
Also, it is known to use filter inserts, for instance in the form of 25 a paper filter, which, fastened in a fixture, hangs down from the top of the container. This filter insert works satisfactory, but encumbered with those inconveniences, that the volume of infusion is relatively small, and that the filter insert after expiration of the extraction time must be taken up from the liquid so as to prevent further infusion 3 0 : between the liquid and the filter pulp, after which the larger part of the liquid contained in the filter pulp normally should be squeezed out from the filter pulp and deposited after that. This can not always take place, as both the pressing and the deposit possibillities can be limited in time and locality, and besides, the mechanical strength of 3 5 the paper material is limited. The need for pressing the filter pulp has arizen from, partly, the desire to reduce waste or, partly, to prevent dripping of liquid on the way between the container and the place of deposit.
Furthermore, it is known from other extraction methods to separate the filter pulp in the bottom of a cylindrical container, where a plunger having a diameter corresponding to the inner diameter of the container and having filtering sections is pressed down through the liquid and partly separates the filter pulp from the liquid.
Herewith, a sufficiently large volume of infusion is achieved and, a certain possibility for pressing the liquid out from the filter pulp, but it is like the state of the art known from the FR-Patent no. 1.196.574, not possible to stop the infusion totally, as there still exists a connection through the filtering sections of the plunger between the liquid and the filter pulp.
The invention is therefore based on the object to provide the largest possible volume of infusion, to separate filter pulp and liquid in such a way, that after the separation no infusion takes place between filter pulp and liquid, and to eliminate the need for external deposit, while the largest possible quantity of liquid is pressed from the filter pulp.
The invention accordingly provides filter insert for a container, where a certain dwelling time should be provided for filter pulp in a liquid held in the container, the insert consisting of a cylindrical filter unit, extending downwards from the top of the container to extend down below the surface of the liquid in the container when filled, the filter unit having an upper part and a lower part, and a plunger shaft with a plunger sliding in a plunger guide, that extends axially through the upper part, the plunger having a rim flange and being moveable downwardly to the bottom of the filter insert, the filter insert bottom part consisting of a material which is impermeable to the liquid, and the top part mainly - 2a -consisting of a material permeable to the liquid which can keep the filter pulp, the plunger also being impermeable and being vaulted upwards so that the central area is higher than the circumference area, the plunger having an upright rim flange.
With the empodiment of the filter insert according to the invention the following advantages are obtained in, that an effective separation between filter pulp and liquid is provided, that this separation appears by a simple movement of the plunger from one extreme position to the other, and that the filtrate is accessible immediately after the separation, without first removing the filter pulp from the container and thereby risking drops and splash liquid on the way between the container and the place of deposit for the filter pulp. Moreover, the largest possible infusion volume is secured by having the plunger floating on top of the liquid during the infusion as a result partly of the vaulted embodiment and partly of the upright rim flange.
After the pressing down of the plunger it remains in the bot-tom position, as it after the submersion in the liquid loses its buoyancy capacity.
In an appropriate embodiment of the filter insert the top part consists of two parts, namely a filtering unit and a lid part, in which the plunger guide is placed. The lid part can be elaborated so, that the top part covers the filter insert totally and simultaneously operates as a lid for the extraction container.
In a specially appropriate embodiment the permeable part of the filter insert is made with a releasable connection both to the bottom part and to the lid part, where the filter insert is equipped with a section preferably of plastics provided with grip-means suiting corresponding grip-means in the corresponding part of the bottom part or the lid part.
With this arrangement a favourable separation possibility is provided, so that the permeable part of the filter insert, having a small mechanical stability against pressure and bending forces in proportion to plastics or glass, easily can be replaced should it be damaged. Also, an eventual cleaning will be made easier with this possibility of separation.
The gripping means can, favourably, be made as screw threads, as bayonet socket or as snap-locks. It should be observed, that the wire screen is not influenced by pressure or bending forces, for which reason the assembling and the disassembling of the gripping means shall take place with the least possible exertion of force.
A filter insert according to the invention can be used in an arbitrary extraction container dependent of its opening diameter, if only the precondition is observed, that 3a the wire screen during the infusion phase can reach totally down under the surface of the liquid in the container.
A preferred embodiment of the invention, where it is used as a filter insert in a tea pot, is elaborated in the following specification with reference to the drawing.
The drawing shows on:
fig. 1 a tea pot of glass equipped with a filter insert according to the invention, fig.2 the same view as fig. 1, but with a partly sectional view of the filter insert, and fig. 3 a sectional view of the filter insert according to the in-s vention. .
Figure 1 shows a tea pot of glass equipped with a-filter insert 1 according to the invention. The filter insert 1 consists of a bottom part 2 and a top part 3 consisting of a wire screen 3a, which is fast-s 0 erred to a Iid part 6 with the , help of a not specifically shown coupling part. In the lid part 6 a bushing 7 is fastened serving as guidance for a plunger shaft 4. On top of the plunger shaft 4 a handle 10 is placed, and at the bottom of the plunger shaft 4 a plunger 5 is placed the dia meter of which corresponds to the inner diameter of the wire screen is 3a.
In figure 2 a partly sectional view of the filter insert 1 is shown, from which it can be seen, how the top part 3 is fastened to the bot-tom part 2. At the bottom of the wire screen 3a a coupling part is fastened, which is equipped with grip- or locking means 8 suiting cor-e o responding grip- or locking means 9 in the corresponding part of the bottom part 2. In figure 2 the embodiment of the grip- or locking moans 8, 9 is only drafted, as arbitrary embodiments can be used for these grip- or locking means 8, 9. Ia the embodiment of the grip- or locking means 8, 9 shown in , figure 2 these have the form of an ern-25 bossment $ and a corresponding groove 9, where the embossment 8 is brought into engagement in the groove 9 by a snap effect. As earl-ier stated, the grip- or locking means can also be in the form of screw threads or as a bayonet socket.
Figure 2 also shows a partly section through the plunger 5, 3 0.' where can be seen, that the upright rim Sa has a height, which in this embodiment is nearly half as high as the vault of the plunger. The height of the rim is determinative for the buoyancy of the plunger and shall just be adjusted to the total weight of plunger 5, plunger shaft 4 and handle 10.
3 3 Figure 3 shows a filter insert 1 in sectional view, where, how-ever, no grip- or locking means 8, 9 are shown, as a separation be-tween the bottom part 2 and the top part 3 is not absolutely necess-ary in order to obtain the purpose of the invention.
i I , The lid part 6 on the top part 3 is formed so, that it has a bushing 7, which guides the plunger shaft 4.
The lid part 6 and the plunger shaft 4 are assembled in a unit, which can be removed during the preparation of the 5 tea.
On top of the plunger shaft 4 a handle 10 is placed, as earlier mentioned, in order to ease the operation of the plunger 5 and the plunger shaft 4. The handle 10, which shall not be more elaborated, can be formed in an arbitrary way, as only utilization and/or esthetical considerations should be taken into account. In a special appropriate embodiment of the handle 10 it could further contain a not shown clock, which appropriately could be operated by a battery or by thermo-electrical elements driven by temperature differences. This clock could hereby measure the duration of the infusion phase, so that the correct duration of this phase could be secured. Some tea-sorts need an extraction time of 5 minutes and other tea-sorts, including Keemun tea, need extraction time of 15 minutes. The presence of the clock is not essential to the filter insert, but it eases the use of a tea pot with a filter insert according to the invention, when the use takes place far from normal kitchen timers or the like.
The process itself by using the filter insert is not much different from the process known from other filter types, until the end of the infusion phase. After pouring the water through the filter insert 1, the plunger 5 is placed in the top of the wire screen floating so as to secure, that all the contents of the filter is below the surface of the water. After that, the lid is placed in the lid part. Where, till now, the filter with its contents should be lifted up from the tea pot, eventually pressing tea out from the filter and successively take the filter to 5a a deposit area, a pressure downwards should be exerted on the handle 10 with the filter insert according to the invention, whereby the plunger 5 is brought axially through the filter insert 1 down towards the bottom part 2, where the plunger 5 and the bottom part 2 together encapsulate the filter pulp after the filtrate at the same time has been pressed out from the filter pulp.
With the embodiment of the filter insert according to the invention the following advantages are obtained in, that an effective separation between filter pulp and liquid is provided, that this separation appears by a simple movement of the plunger from one extreme position to the other, and that the filtrate is accessible immediately ~lUtlt~~~
Herewith, a sufficiently large volume of infusion is achieved and, a certain possibility for pressing the liquid out from the filter pulp, but it is like the state of the art known from the FR-Patent no. 1.196.574, not possible to stop the infusion totally, as there still exists a connection through the filtering sections of the plunger between the liquid and the filter pulp.
The invention is therefore based on the object to provide the largest possible volume of infusion, to separate filter pulp and liquid in such a way, that after the separation no infusion takes place between filter pulp and liquid, and to eliminate the need for external deposit, while the largest possible quantity of liquid is pressed from the filter pulp.
The invention accordingly provides filter insert for a container, where a certain dwelling time should be provided for filter pulp in a liquid held in the container, the insert consisting of a cylindrical filter unit, extending downwards from the top of the container to extend down below the surface of the liquid in the container when filled, the filter unit having an upper part and a lower part, and a plunger shaft with a plunger sliding in a plunger guide, that extends axially through the upper part, the plunger having a rim flange and being moveable downwardly to the bottom of the filter insert, the filter insert bottom part consisting of a material which is impermeable to the liquid, and the top part mainly - 2a -consisting of a material permeable to the liquid which can keep the filter pulp, the plunger also being impermeable and being vaulted upwards so that the central area is higher than the circumference area, the plunger having an upright rim flange.
With the empodiment of the filter insert according to the invention the following advantages are obtained in, that an effective separation between filter pulp and liquid is provided, that this separation appears by a simple movement of the plunger from one extreme position to the other, and that the filtrate is accessible immediately after the separation, without first removing the filter pulp from the container and thereby risking drops and splash liquid on the way between the container and the place of deposit for the filter pulp. Moreover, the largest possible infusion volume is secured by having the plunger floating on top of the liquid during the infusion as a result partly of the vaulted embodiment and partly of the upright rim flange.
After the pressing down of the plunger it remains in the bot-tom position, as it after the submersion in the liquid loses its buoyancy capacity.
In an appropriate embodiment of the filter insert the top part consists of two parts, namely a filtering unit and a lid part, in which the plunger guide is placed. The lid part can be elaborated so, that the top part covers the filter insert totally and simultaneously operates as a lid for the extraction container.
In a specially appropriate embodiment the permeable part of the filter insert is made with a releasable connection both to the bottom part and to the lid part, where the filter insert is equipped with a section preferably of plastics provided with grip-means suiting corresponding grip-means in the corresponding part of the bottom part or the lid part.
With this arrangement a favourable separation possibility is provided, so that the permeable part of the filter insert, having a small mechanical stability against pressure and bending forces in proportion to plastics or glass, easily can be replaced should it be damaged. Also, an eventual cleaning will be made easier with this possibility of separation.
The gripping means can, favourably, be made as screw threads, as bayonet socket or as snap-locks. It should be observed, that the wire screen is not influenced by pressure or bending forces, for which reason the assembling and the disassembling of the gripping means shall take place with the least possible exertion of force.
A filter insert according to the invention can be used in an arbitrary extraction container dependent of its opening diameter, if only the precondition is observed, that 3a the wire screen during the infusion phase can reach totally down under the surface of the liquid in the container.
A preferred embodiment of the invention, where it is used as a filter insert in a tea pot, is elaborated in the following specification with reference to the drawing.
The drawing shows on:
fig. 1 a tea pot of glass equipped with a filter insert according to the invention, fig.2 the same view as fig. 1, but with a partly sectional view of the filter insert, and fig. 3 a sectional view of the filter insert according to the in-s vention. .
Figure 1 shows a tea pot of glass equipped with a-filter insert 1 according to the invention. The filter insert 1 consists of a bottom part 2 and a top part 3 consisting of a wire screen 3a, which is fast-s 0 erred to a Iid part 6 with the , help of a not specifically shown coupling part. In the lid part 6 a bushing 7 is fastened serving as guidance for a plunger shaft 4. On top of the plunger shaft 4 a handle 10 is placed, and at the bottom of the plunger shaft 4 a plunger 5 is placed the dia meter of which corresponds to the inner diameter of the wire screen is 3a.
In figure 2 a partly sectional view of the filter insert 1 is shown, from which it can be seen, how the top part 3 is fastened to the bot-tom part 2. At the bottom of the wire screen 3a a coupling part is fastened, which is equipped with grip- or locking means 8 suiting cor-e o responding grip- or locking means 9 in the corresponding part of the bottom part 2. In figure 2 the embodiment of the grip- or locking moans 8, 9 is only drafted, as arbitrary embodiments can be used for these grip- or locking means 8, 9. Ia the embodiment of the grip- or locking means 8, 9 shown in , figure 2 these have the form of an ern-25 bossment $ and a corresponding groove 9, where the embossment 8 is brought into engagement in the groove 9 by a snap effect. As earl-ier stated, the grip- or locking means can also be in the form of screw threads or as a bayonet socket.
Figure 2 also shows a partly section through the plunger 5, 3 0.' where can be seen, that the upright rim Sa has a height, which in this embodiment is nearly half as high as the vault of the plunger. The height of the rim is determinative for the buoyancy of the plunger and shall just be adjusted to the total weight of plunger 5, plunger shaft 4 and handle 10.
3 3 Figure 3 shows a filter insert 1 in sectional view, where, how-ever, no grip- or locking means 8, 9 are shown, as a separation be-tween the bottom part 2 and the top part 3 is not absolutely necess-ary in order to obtain the purpose of the invention.
i I , The lid part 6 on the top part 3 is formed so, that it has a bushing 7, which guides the plunger shaft 4.
The lid part 6 and the plunger shaft 4 are assembled in a unit, which can be removed during the preparation of the 5 tea.
On top of the plunger shaft 4 a handle 10 is placed, as earlier mentioned, in order to ease the operation of the plunger 5 and the plunger shaft 4. The handle 10, which shall not be more elaborated, can be formed in an arbitrary way, as only utilization and/or esthetical considerations should be taken into account. In a special appropriate embodiment of the handle 10 it could further contain a not shown clock, which appropriately could be operated by a battery or by thermo-electrical elements driven by temperature differences. This clock could hereby measure the duration of the infusion phase, so that the correct duration of this phase could be secured. Some tea-sorts need an extraction time of 5 minutes and other tea-sorts, including Keemun tea, need extraction time of 15 minutes. The presence of the clock is not essential to the filter insert, but it eases the use of a tea pot with a filter insert according to the invention, when the use takes place far from normal kitchen timers or the like.
The process itself by using the filter insert is not much different from the process known from other filter types, until the end of the infusion phase. After pouring the water through the filter insert 1, the plunger 5 is placed in the top of the wire screen floating so as to secure, that all the contents of the filter is below the surface of the water. After that, the lid is placed in the lid part. Where, till now, the filter with its contents should be lifted up from the tea pot, eventually pressing tea out from the filter and successively take the filter to 5a a deposit area, a pressure downwards should be exerted on the handle 10 with the filter insert according to the invention, whereby the plunger 5 is brought axially through the filter insert 1 down towards the bottom part 2, where the plunger 5 and the bottom part 2 together encapsulate the filter pulp after the filtrate at the same time has been pressed out from the filter pulp.
With the embodiment of the filter insert according to the invention the following advantages are obtained in, that an effective separation between filter pulp and liquid is provided, that this separation appears by a simple movement of the plunger from one extreme position to the other, and that the filtrate is accessible immediately ~lUtlt~~~
after the separation, without first removing the filter pulp from the container and thereby risking drops and splash liquid on the way be-tween the container and the place of deposit for the filter pulp.
With the connection of the filter insert capable of being disas s sembled from the bottom part and the top part; a favourable possibil ity of disassembling is achieved, so that the permeable part of the fil ter insert easily can be replaced should it be damaged. Also, the cleaning of the filter insert is facilitated with this disassembling.
While the invention has been described with reference to a pre i o ferred embodiment, it will be apparent that improvements and modi fications may be made within the purview of the invention by those of ordinary skill in the art.
is
With the connection of the filter insert capable of being disas s sembled from the bottom part and the top part; a favourable possibil ity of disassembling is achieved, so that the permeable part of the fil ter insert easily can be replaced should it be damaged. Also, the cleaning of the filter insert is facilitated with this disassembling.
While the invention has been described with reference to a pre i o ferred embodiment, it will be apparent that improvements and modi fications may be made within the purview of the invention by those of ordinary skill in the art.
is
Claims (9)
1. Filter insert (1) for a container, where a certain dwelling time should be provided for filter pulp in a liquid held in the container, the insert consisting of a cylindrical filter unit (1), extending downwards from the top of the container to extend down below the surface of the liquid in the container when filled, the filter unit having an upper part and a lower part, and a plunger shaft (4) with a plunger (5) sliding in a plunger guide (7), that extends axially through the upper part (3), the plunger (5) having a rim flange (5a) and being moveable downwardly to the bottom of the filter insert (1), the filter insert bottom part (2) consisting of a material which is impermeable to the liquid, and the top part (3) mainly consisting of a material permeable to the liquid which can keep the filter pulp, the plunger (5) also being impermeable and being vaulted upwards so that the central area is higher than the circumference area, the plunger having an upright rim flange.
2. Filter insert according to claim 1, characterized in that the top part (3) consists of two parts, namely a lid part (6), in which the plunger guide (7) is placed and a filtering unit (3a).
3. Filter insert according to claim 2, characterized in that the lid part is so elaborated, that the top part (3) covers the filter insert (1) totally and simultaneously operates as a lid for the container.
4. Filter insert according to any one of claims 1 to 3, characterized in that the permeable part (3a) of the filter insert (1) is made with a releasable connection both to the bottom part (2) and to the lid part (6).
5. Filter insert according to any one of claims 1 to 4, characterized in that the permeable part of the filter insert (1) is equipped with a section provided with grip-means (8) matching with corresponding grip-means (9) in the corresponding part of the bottom part (2) or the lid part (6).
6. Filter insert according to claim 5, characterized in that the gripping means (8, 9) are made as screw threads.
7. Filter insert according to claim 5, characterized in that the gripping means (8, 9) are made as bayonet connections.
8. Filter insert according to claim 5, characterized in that the gripping means (8, 9) are made as snap locks.
9. Filter insert according to any one of claims 1 to 8, characterized in that the height of the rim flange is nearly of the same size as the height of the vaulted central area of the plunger.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DK017691A DK17691A (en) | 1991-02-01 | 1991-02-01 | FILTER INSERT FOR CONTAINERS |
| DK176/91 | 1991-02-01 | ||
| PCT/DK1992/000033 WO1992013475A1 (en) | 1991-02-01 | 1992-01-31 | Filter insert for containers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2100455A1 CA2100455A1 (en) | 1992-08-02 |
| CA2100455C true CA2100455C (en) | 2004-11-16 |
Family
ID=8090631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002100455A Expired - Lifetime CA2100455C (en) | 1991-02-01 | 1992-01-31 | Filter insert for containers |
Country Status (14)
| Country | Link |
|---|---|
| US (1) | US5453189A (en) |
| EP (2) | EP0497726A1 (en) |
| JP (1) | JP3011766B2 (en) |
| AT (1) | ATE117182T1 (en) |
| AU (1) | AU660655B2 (en) |
| CA (1) | CA2100455C (en) |
| CH (1) | CH684154A5 (en) |
| DE (1) | DE69201237T2 (en) |
| DK (2) | DK17691A (en) |
| ES (1) | ES2069991T3 (en) |
| GR (1) | GR3015856T3 (en) |
| IL (1) | IL100840A0 (en) |
| NZ (1) | NZ270328A (en) |
| WO (1) | WO1992013475A1 (en) |
Families Citing this family (35)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9513572D0 (en) * | 1995-07-04 | 1995-09-06 | Ag Patents Ltd | Infusion container |
| US5753117A (en) * | 1996-06-05 | 1998-05-19 | Fleetguard, Inc. | Replaceable filter element and snap-on filter lid assembly |
| WO1998010686A1 (en) * | 1996-09-10 | 1998-03-19 | Pi-Design Ag | Display means for time and temperature in apparatus for preparing hot or cold drinks |
| US5806408A (en) * | 1996-11-01 | 1998-09-15 | Debacker; Johanna N. | Beverage brewing device |
| US5927180A (en) * | 1997-02-19 | 1999-07-27 | Russo; Thomas L | Beverage flow pot |
| US6168816B1 (en) | 1997-11-26 | 2001-01-02 | Chris Hammond | Beverage infuser |
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-
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- 1991-02-01 DK DK017691A patent/DK17691A/en not_active Application Discontinuation
-
1992
- 1992-01-29 NZ NZ270328A patent/NZ270328A/en not_active IP Right Cessation
- 1992-01-31 JP JP4503930A patent/JP3011766B2/en not_active Expired - Fee Related
- 1992-01-31 DK DK92903772.9T patent/DK0569435T3/en active
- 1992-01-31 AU AU12225/92A patent/AU660655B2/en not_active Expired
- 1992-01-31 DE DE69201237T patent/DE69201237T2/en not_active Expired - Lifetime
- 1992-01-31 WO PCT/DK1992/000033 patent/WO1992013475A1/en active IP Right Grant
- 1992-01-31 CA CA002100455A patent/CA2100455C/en not_active Expired - Lifetime
- 1992-01-31 IL IL100840A patent/IL100840A0/en not_active IP Right Cessation
- 1992-01-31 ES ES92903772T patent/ES2069991T3/en not_active Expired - Lifetime
- 1992-01-31 AT AT92903772T patent/ATE117182T1/en not_active IP Right Cessation
- 1992-01-31 EP EP92610008A patent/EP0497726A1/en active Pending
- 1992-01-31 EP EP92903772A patent/EP0569435B1/en not_active Expired - Lifetime
- 1992-01-31 CH CH3091/92A patent/CH684154A5/en not_active IP Right Cessation
-
1993
- 1993-07-30 US US08/094,037 patent/US5453189A/en not_active Expired - Lifetime
-
1995
- 1995-04-18 GR GR950400988T patent/GR3015856T3/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DK0569435T3 (en) | 1995-05-22 |
| US5453189A (en) | 1995-09-26 |
| DE69201237D1 (en) | 1995-03-02 |
| DK17691D0 (en) | 1991-02-01 |
| DK17691A (en) | 1991-09-11 |
| WO1992013475A1 (en) | 1992-08-20 |
| GR3015856T3 (en) | 1995-07-31 |
| AU1222592A (en) | 1992-09-07 |
| JPH06505168A (en) | 1994-06-16 |
| EP0569435B1 (en) | 1995-01-18 |
| CA2100455A1 (en) | 1992-08-02 |
| NZ270328A (en) | 1998-03-25 |
| JP3011766B2 (en) | 2000-02-21 |
| DE69201237T2 (en) | 1995-08-31 |
| CH684154A5 (en) | 1994-07-29 |
| ES2069991T3 (en) | 1995-05-16 |
| EP0497726A1 (en) | 1992-08-05 |
| EP0569435A1 (en) | 1993-11-18 |
| ATE117182T1 (en) | 1995-02-15 |
| AU660655B2 (en) | 1995-07-06 |
| IL100840A0 (en) | 1992-09-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |